phonacoscope

pho·nac·o·scope

(fō-nak'ō-skōp),
An instrument for increasing the intensity of the percussion note or of the voice sounds; the examiner's ear or the stethoscope is placed on the opposite side of the chest.
[phon- + G. akouō, to listen, + skopeō, to view]

phonacoscope

(fō-năk′ō-skōp) [Gr. phone, voice, + skopein, to examine]
A device for amplifying the percussion note or voice sounds.

pho·nac·o·scope

(fō-nakŏ-skōp)
An instrument for increasing the intensity of the percussion note or of the voice sounds.
[phon- G. phōnē voice + G. akouō, to listen, + skopeō, to view]